void PhysicsFrameSplineEditor::addControlPoint() {
if (m_spline.control.size() == 0) {
m_spline.append(CFrame());
} else if (m_spline.control.size() == 1) {
// Adding the 2nd point
CFrame f = m_spline.control.last();
f.translation += f.lookVector();
m_spline.append(f);
resizeControlPointDropDown(m_spline.control.size());
// Select the new point
setSelectedControlPointIndex(m_selectedControlPointIndex + 1);
} else {
// Adding between two points
float t0 = m_spline.time[m_selectedControlPointIndex];
float newT = t0;
float evalT = 0;
if (m_selectedControlPointIndex < m_spline.control.size() - 1) {
// Normal interval
newT = m_spline.time[m_selectedControlPointIndex + 1];
evalT = (t0 + newT) / 2;
} else if (m_spline.extrapolationMode == SplineExtrapolationMode::CYCLIC) {
// After the end on a cyclic spline
newT = m_spline.getFinalInterval() + t0;
evalT = (t0 + newT) / 2;
} else {
// After the end on a non-cyclic spline of length at least
// 2; assume that we want to step the distance of the previous
// interval
newT = evalT = 2.0f * t0 - m_spline.time[m_selectedControlPointIndex - 1];
}
const PhysicsFrame f = m_spline.evaluate(evalT);
m_spline.control.insert(m_selectedControlPointIndex + 1, f);
m_spline.time.insert(m_selectedControlPointIndex + 1, newT);
// Select the new point
resizeControlPointDropDown(m_spline.control.size());
setSelectedControlPointIndex(m_selectedControlPointIndex + 1);
// Fix the rest of the times to be offset by the inserted duration
float shift = newT - t0;
for (int i = m_selectedControlPointIndex + 1; i < m_spline.time.size(); ++i) {
m_spline.time[i] += shift;
}
}
}
bool PhysicsFrameSplineEditor::hitsSpline(const Ray& r) {
int j = m_spline.control.size();
for (int i = 0; i < j; ++i) {
const CFrame& c = m_spline.control[i];
if(r.intersectionTime(Sphere(c.translation, CONTROL_POINT_RADIUS), true) != finf()) {
setSelectedControlPointIndex(i);
return true;
}
}
return false;
}
void PhysicsFrameSplineEditor::removeSelectedControlPoint() {
if (m_spline.control.size() <= 1) {
// Can't delete!
return;
}
// TODO: Should we fix the times? Maybe
m_spline.time.remove(m_selectedControlPointIndex);
m_spline.control.remove(m_selectedControlPointIndex);
setSelectedControlPointIndex(m_selectedControlPointIndex - 1);
}
void PhysicsFrameSplineEditor::controlPointDropDownCallback() {
setSelectedControlPointIndex(m_selectedControlPointIndex);
}
